/*
 * Copyright 2018 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.samples.apps.iosched.widget

import android.graphics.Rect
import android.view.View
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.RecyclerView.ItemDecoration
import androidx.recyclerview.widget.RecyclerView.State
import com.google.samples.apps.iosched.util.isRtl

/** ItemDecoration that adds space around items. */
class SpaceDecoration(
    private val start: Int = 0,
    private val top: Int = 0,
    private val end: Int = 0,
    private val bottom: Int = 0
) : ItemDecoration() {

    override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: State) {
        val isRtl = parent.isRtl()
        outRect.set(
            if (isRtl) end else start,
            top,
            if (isRtl) start else end,
            bottom
        )
    }
}
